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Finding the Fourth Proportional to 139,403.85, 192,377.52 and 75,741.63

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Solution

The fourth proportional to 139,403.85, 192,377.52 and 75,741.63 is: 104,523.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,403.85 : 192,377.52 = 75,741.63 : x
  2. Step 2: Convert to fraction form
    139,403.85/192,377.52 = 75,741.63/x
  3. Step 3: Cross multiply
    139,403.85x = 192,377.52 × 75,741.63
  4. Step 4: Simplify right side
    139,403.85x = 14,570,986,940.16
  5. Step 5: Solve for x
    x = 14,570,986,940.16/139,403.85
  6. Step 6: Final answer
    x = 104,523.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.